Owing to the excellent fuel comsumption of Shigenobu, the ship owner decided to build 2nd gate rudder vessel which is larger than the original ship. Addition to this new vessel, another two coastal vessels will be build early next year. We will introduce their sea trial results again.
New tech or not as long as it works and could save more fuel/energy it's an improvement to the conventional system. I appreciate people who works on this project, well done!
From "Motor Ship" 2nd May 2019 --- Analysis of voyage data for the world’s first vessel fitted with a Gate Rudder reveal fuel savings of up to 30 percent compared with a sister vessel. The world’s first gate rudder system was fitted to the container ship Shigenobu, which entered service in 2018. The voyage data from the vessel’s first nine months of service reveal that this recently patented system could provide energy savings of as much as 30%, compared with the voyage data of an identical container ship Sakura, fitted with a flap rudder. The results suggest the innovative Gate Rudder arrangement holds significant potential to replace the conventional propeller-rudder systems to achieve a step change in EEDI compliance.
The new video clip of the gate rudder " Gate Rudder after delivery" will be uploaded soon. It will introduce the performance of the gate rudder after delivery. The bow thruster is very important for a coastal vessel because they need to berth without support of tug boats. Generally speaking, the combination of a bow thruster and a special high lift rudder is a standard like a sister ship Sakura. In order to obtain the large turning moment, the bow thruster will be installed on the bow part as far as possible from the mid ship. In order to control two dimensional ship motions (surge, sway and yaw), we need two thrusters at least.
After 12 months from delivery, the voyage data from both vessels revealed that fuel savings by the Gate Rudder could be much larger than the sea trial (abt.30%. more than two times). We found two mechanisms for this. One is tacking effect by the Gate Rudder blades same as a sail at sailing. Another mechanism is USB (upper surface blowing) effect by the propeller induction velocities.
Sometimes we are asked the difference from Kitchen rudder. The main difference is the energy saving ability. The bottom part of Kitchen rudder will generate large drag if it is installed on the large ocean going vessels. The Kitchen rudder can work only for boats with slender or shallow after body and slow speed because they don't need to care about vibration/cavitation/erosion.
My sense is that it may need bottom support on larger vessels. This would assist with bearing surface life. It still should be less expensive than azipods.
I don't think many people understand that the advantage of this over vector thrust units or z-piller thrusters is that it is a way of retrofitting older ships far more cheaply and easily. The technology isn't as advanced as other methods but it doesn't need to be.
It good to have gate rudder fitted in a certain ships .it helps at lot short maneuver and improve the vessel turning radius , but their are new propulsion unit now a days using " z- piller " that not only for ships but for oil rig flatform just to maintain thier position on site especially during rough seas
Nothing new, We had the kitchener rudders fitted to our motorboats in the Royal Navy during the 1950' , 60's & 70's. I enjoyed the system, very controllable.
It helps the water flow better around the prop, and can provide more effective side thrust for increased manueverability. try that with a conventional rudder, and after a certain angle it will lose effectiveness. so better for maneuvering, while retaining the low drag profile of conventional rudders. best of both worlds, and relatively simple, as it's just one more shaft. that's how I understand it anyhow.
FPVREVIEWS cool I used to work on tugs not to long ago when everybody was going crazy over tractor tugs then I guess I missed this one Thank you for the information. God bless
In addition to the other points already made by others, I would imagine significantly less drag since the water column from the prop is not directly striking the rudder, like with stern rudders. Also, the thinner cross section in parallel probably generates better laminar flow and less vortices, thus reducing drag and increasing fuel efficiency. I'm not an engineer but those are my guesses.
I work on sea-going tugboats in the coastal trade on the eastern seaboard of the US. At a guess, this gate rudder system is cheaper and easier to install than pods. The pods loose a lot of power through the gear train, up over the pod, 90* turn at the top ,90* turn at the bottom. With the gate rudder(s?) there is a conventional straight shaft and seemingly less wetted surface than the neck ,hub and nozzle of a pod.Also there seams to be a back log on the pods. The are only built by a few firms. Rolls Royce being one. So there are building delays,as well. I was on a 30 year old conventional tugboat that had 3000 hp , 5 foot 4 bladed propellers, kort nozzles,flanking rudders and main rudders. We had a head to head push contest with a then 1 year old tractor tug of 3000hp 5 foot 4 bladed propellers in pods (with nozzles). The conventional tug got water going through its wheels significantly faster and shoved the tractor backwards. The Gate rudder is a very interesting idea that could be a game changer.
Pods have much higher cross section drag coefficient and are less fuel efficient. They're fine for high power maneuvering for tugs but not long distance efficiency.
Owing to the excellent fuel comsumption of Shigenobu, the ship owner decided to build 2nd gate rudder vessel which is larger than the original ship. Addition to this new vessel, another two coastal vessels will be build early next year. We will introduce their sea trial results again.
New tech or not as long as it works and could save more fuel/energy it's an improvement to the conventional system. I appreciate people who works on this project, well done!
From "Motor Ship" 2nd May 2019 ---
Analysis of voyage data for the world’s first vessel fitted with a Gate Rudder reveal fuel savings of up to 30 percent compared with a sister vessel.
The world’s first gate rudder system was fitted to the container ship Shigenobu, which entered service in 2018. The voyage data from the vessel’s first nine months of service reveal that this recently patented system could provide energy savings of as much as 30%, compared with the voyage data of an identical container ship Sakura, fitted with a flap rudder. The results suggest the innovative Gate Rudder arrangement holds significant potential to replace the conventional propeller-rudder systems to achieve a step change in EEDI compliance.
The new video clip of the gate rudder " Gate Rudder after delivery" will be uploaded soon. It will introduce the performance of the gate rudder after delivery. The bow thruster is very important for a coastal vessel because they need to berth without support of tug boats. Generally speaking, the combination of a bow thruster and a special high lift rudder is a standard like a sister ship Sakura. In order to obtain the large turning moment, the bow thruster will be installed on the bow part as far as possible from the mid ship.
In order to control two dimensional ship motions (surge, sway and yaw), we need two thrusters at least.
Seems brilliant. In addition also appear to be adaptable to existing vessels without major works.
After 12 months from delivery, the voyage data from both vessels revealed that fuel savings by the Gate Rudder could be much larger than the sea trial (abt.30%. more than two times).
We found two mechanisms for this. One is tacking effect by the Gate Rudder blades same as a sail at sailing. Another mechanism is USB (upper surface blowing) effect by the propeller induction velocities.
Consider adding a horizontal plate directly below the rudders and propeller. It should augment all performances
what does crabbing mode do?
@@geennaam2712 in conjunction with a bow thruster, the ship can move completely sideways, like when leaving a dock.
Sometimes we are asked the difference from Kitchen rudder. The main difference is the energy saving ability. The bottom part of Kitchen rudder will generate large drag if it is installed on the large ocean going vessels.
The Kitchen rudder can work only for boats with slender or shallow after body and slow speed because they don't need to care about vibration/cavitation/erosion.
Really interesting, good to see that there are more improvements that need to be done in this world
To me it seems too slow. But just a test.
Lot more control with kitchener rudder
I appears so. Good stoping power.
I'm not an expert like some here but I'm totally impressed.
@ZeOverman Yeah for 20 times the money and 10 times the complication. This has real world commerce potential.
My sense is that it may need bottom support on larger vessels. This would assist with bearing surface life. It still should be less expensive than azipods.
That was my first thought as well!
I don't think many people understand that the advantage of this over vector thrust units or z-piller thrusters is that it is a way of retrofitting older ships far more cheaply and easily. The technology isn't as advanced as other methods but it doesn't need to be.
This music has me totally hyped up for it , man!
well, it's look like so useful for large ship ! especial the stopping mode ! more safe for emergency may crash happen !
Is the propeller floating?
A model test of Shigenobu with a Gate Rudder was conducted at Istanbul Technical University (ITU) using 5m wooden model.
It good to have gate rudder fitted in a certain ships .it helps at lot short maneuver and improve the vessel turning radius , but their are new propulsion unit now a days using " z- piller " that not only for ships but for oil rig flatform just to maintain thier position on site especially during rough seas
I think the advantage of this is that it's far easier to retrofit to older ships than a z-piller thruster system.
Wouldn’t it be easier to use an azipod?
Fantastic..! Amazing innovation setting standards to efficient manoeuvring!
Early Hamilton jet boats had gate steer back in the 60s
full reverse looks like it would rip the rudders off if going full speed. they look a little flimsy
Very interesting, first I have seen this design. I hope it works.
In the Roman Empire days, the Romans would have been real proud of this technology. No more slave oar men.
Nothing new, We had the kitchener rudders fitted to our motorboats in the Royal Navy during the 1950' , 60's & 70's. I enjoyed the system, very controllable.
Ahhhhh - white text on a cloud background is a poor choice ........
If it makes them more maneuverable underway, warships could benefit from this.
Could have saved the Hood.
vectored thrust. nice.
That is the coolest thing!! I wonder if that system is available for smaller vessels? Thanks for sharing!
What about a korts nosal a tube around the proppeler???
So in a rough sea it can only go straight ahead? If this is so is that not a major limitation?
Sounds like a locomotive.
padang kota ook laa.
b .n a .c .i rab
Big energy savings for a brilliant but simple idea...
What purpose is this serving??? Actual question not smug.
It helps the water flow better around the prop, and can provide more effective side thrust for increased manueverability. try that with a conventional rudder, and after a certain angle it will lose effectiveness. so better for maneuvering, while retaining the low drag profile of conventional rudders. best of both worlds, and relatively simple, as it's just one more shaft. that's how I understand it anyhow.
FPVREVIEWS cool I used to work on tugs not to long ago when everybody was going crazy over tractor tugs then I guess I missed this one Thank you for the information. God bless
In addition to the other points already made by others, I would imagine significantly less drag since the water column from the prop is not directly striking the rudder, like with stern rudders. Also, the thinner cross section in parallel probably generates better laminar flow and less vortices, thus reducing drag and increasing fuel efficiency. I'm not an engineer but those are my guesses.
I wonder if it is mounted in warships.....I guess it is not
what is crabbing mode for?
Jiashun Gou, I think side-to-side maneuvers.
Berthing, tight turns in canals?
why not a pod?
I work on sea-going tugboats in the coastal trade on the eastern seaboard of the US. At a guess, this gate rudder system is cheaper and easier to install than pods. The pods loose a lot of power through the gear train, up over the pod, 90* turn at the top ,90* turn at the bottom. With the gate rudder(s?) there is a conventional straight shaft and seemingly less wetted surface than the neck ,hub and nozzle of a pod.Also there seams to be a back log on the pods. The are only built by a few firms. Rolls Royce being one. So there are building delays,as well. I was on a 30 year old conventional tugboat that had 3000 hp , 5 foot 4 bladed propellers, kort nozzles,flanking rudders and main rudders. We had a head to head push contest with a then 1 year old tractor tug of 3000hp 5 foot 4 bladed propellers in pods (with nozzles). The conventional tug got water going through its wheels significantly faster and shoved the tractor backwards.
The Gate rudder is a very interesting idea that could be a game changer.
@@Pocketfarmer1 ua-cam.com/video/qaEtcBUl_o0/v-deo.html
Pods have much higher cross section drag coefficient and are less fuel efficient. They're fine for high power maneuvering for tugs but not long distance efficiency.
How can it be the world's first when it has been used on canal boats for decades?
It's just a kitchen rudder without a bearing pintle.
I agree with you the principle is still the same what ever they say!!!!! So it is not a new invention just an alteration:-)
It's a never before seen... copy of a kitchen rudder.
NO IT IS NOT THE WORLD'S FIRST "GATE RUDDER".
Glorified kitchen gear.
Yes Ray.
Cut the crap music and add commentary. Can't you speak?!
mukaishima dockyard
I'm not a marine architect but to me those rudders look rather flimsy and unprotected for such a big vessel.
And the last
dyno!
Japps trying to out-flank patent on kitchen rudder with cheap knock-off
Outflank a patent from 1916?!? Your country will decide if prior art is an issue (but nice of you to stand and be counted).
Seems like a failure from the start
Sorry but did you watch the video??
@@Arthur-ej5gi - The failure start to failure finish. Too many parts, to many things to go wrong, just a complete waste of money.
@@mynameisray I think this could be a great idea, let's wait untill further tests have been published before calling a complete waste of money
@@Arthur-ej5gi - He's just a blowhard know nothing.